electron/script/spec-runner.js

#!/usr/bin/env node

const { ElectronVersions, Installer } = require('@electron/fiddle-core');

const { DOMParser } = require('@xmldom/xmldom');
const { hashElement } = require('folder-hash');
const minimist = require('minimist');

const childProcess = require('node:child_process');
const crypto = require('node:crypto');
const fs = require('node:fs');
const net = require('node:net');
const os = require('node:os');
const path = require('node:path');
const { styleText } = require('node:util');

const unknownFlags = [];

const pass = styleText('green', '✓');
const fail = styleText('red', '✗');
const warn = styleText('yellow', '⚠');

const FAILURE_STATUS_KEY = 'Electron_Spec_Runner_Failures';

const args = minimist(process.argv, {
  boolean: ['skipYarnInstall'],
  string: ['runners', 'target', 'electronVersion'],
  number: ['enableRerun'],
  unknown: (arg) => unknownFlags.push(arg)
});

const unknownArgs = [];
for (const flag of unknownFlags) {
  unknownArgs.push(flag);
  const onlyFlag = flag.replace(/^-+/, '');
  if (args[onlyFlag]) {
    unknownArgs.push(args[onlyFlag]);
  }
}

const utils = require('./lib/utils');
const { YARN_SCRIPT_PATH } = require('./yarn');

const BASE = path.resolve(__dirname, '../..');

const runners = new Map([['main', { description: 'Main process specs', run: runMainProcessElectronTests }]]);

const specHashPath = path.resolve(__dirname, '../spec/.hash');

if (args.electronVersion) {
  if (args.runners && args.runners !== 'main') {
    console.log(`${fail} only 'main' runner can be used with --electronVersion`);
    process.exit(1);
  }

  args.runners = 'main';
}

let runnersToRun = null;
if (args.runners !== undefined) {
  runnersToRun = args.runners.split(',').filter((value) => value);
  if (!runnersToRun.every((r) => [...runners.keys()].includes(r))) {
    console.log(`${fail} ${runnersToRun} must be a subset of [${[...runners.keys()].join(' | ')}]`);
    process.exit(1);
  }
  console.log('Only running:', runnersToRun);
} else {
  console.log(`Triggering runners: ${[...runners.keys()].join(', ')}`);
}

async function main() {
  if (args.electronVersion) {
    const versions = await ElectronVersions.create();
    if (args.electronVersion === 'latest') {
      args.electronVersion = versions.latest.version;
    } else if (args.electronVersion.startsWith('latest@')) {
      const majorVersion = parseInt(args.electronVersion.slice('latest@'.length));
      const ver = versions.inMajor(majorVersion).slice(-1)[0];
      if (ver) {
        args.electronVersion = ver.version;
      } else {
        console.log(`${fail} '${majorVersion}' is not a recognized Electron major version`);
        process.exit(1);
      }
    } else if (!versions.isVersion(args.electronVersion)) {
      console.log(`${fail} '${args.electronVersion}' is not a recognized Electron version`);
      process.exit(1);
    }

    const versionString = `v${args.electronVersion}`;
    console.log(`Running against Electron ${styleText('green', versionString)}`);
  }

  const [lastSpecHash, lastSpecInstallHash] = loadLastSpecHash();
  const [currentSpecHash, currentSpecInstallHash] = await getSpecHash();
  const somethingChanged = currentSpecHash !== lastSpecHash || lastSpecInstallHash !== currentSpecInstallHash;

  if (somethingChanged && !args.skipYarnInstall) {
    await installSpecModules(path.resolve(__dirname, '..', 'spec'));
    await getSpecHash().then(saveSpecHash);
  } else if (somethingChanged) {
    // Without the spec install the native addon fixtures stay as the root
    // install built them, against the system Node.js headers, so the ones
    // that need Electron's headers (see installSpecModules) cannot be loaded.
    // CI passes --skipYarnInstall on linux-arm; gate their specs there rather
    // than fail with an ABI error.
    console.log(
      `${warn} --skipYarnInstall leaves the native addon fixtures needing Electron's headers unbuilt; their specs will be skipped`
    );
    process.env.ELECTRON_SKIP_ELECTRON_HEADER_ADDON_SPECS = '1';
  }

  if (!fs.existsSync(path.resolve(__dirname, '../electron.d.ts'))) {
    console.log('Generating electron.d.ts as it is missing');
    generateTypeDefinitions();
  }

  // Provision a silent virtual printer before launching Electron so the
  // webContents.print() specs can run against a real device. Must happen here
  // (before the test process starts) because macOS validates deviceName against
  // a per-process PrintCore snapshot captured at startup.
  const teardownPrinter = await setupVirtualPrinter();
  process.on('exit', teardownPrinter);

  await runElectronTests();
}

function generateTypeDefinitions() {
  const { status } = childProcess.spawnSync('npm', ['run', 'create-typescript-definitions'], {
    cwd: path.resolve(__dirname, '..'),
    stdio: 'inherit',
    shell: true
  });
  if (status !== 0) {
    throw new Error(`Electron typescript definition generation failed with exit code: ${status}.`);
  }
}

function loadLastSpecHash() {
  return fs.existsSync(specHashPath) ? fs.readFileSync(specHashPath, 'utf8').split('\n') : [null, null];
}

function saveSpecHash([newSpecHash, newSpecInstallHash]) {
  fs.writeFileSync(specHashPath, `${newSpecHash}\n${newSpecInstallHash}`);
}

// Runs a command and resolves with its exit code and captured output. Never
// rejects — spawn errors resolve with code -1.
function spawnCapture(cmd, cmdArgs) {
  return new Promise((resolve) => {
    const child = childProcess.spawn(cmd, cmdArgs, { stdio: ['ignore', 'pipe', 'pipe'] });
    let stdout = '';
    let stderr = '';
    child.stdout.on('data', (d) => {
      stdout += d;
    });
    child.stderr.on('data', (d) => {
      stderr += d;
    });
    child.on('error', () => resolve({ code: -1, stdout, stderr }));
    child.on('close', (code) => resolve({ code, stdout, stderr }));
  });
}

function getFreePort() {
  return new Promise((resolve, reject) => {
    const srv = net.createServer();
    srv.on('error', reject);
    srv.listen(0, '127.0.0.1', () => {
      const { port } = srv.address();
      srv.close(() => resolve(port));
    });
  });
}

async function waitForPort(port, timeoutMs = 10000) {
  const start = Date.now();
  while (Date.now() - start < timeoutMs) {
    const listening = await new Promise((resolve) => {
      const sock = net.connect({ host: '127.0.0.1', port }, () => {
        sock.destroy();
        resolve(true);
      });
      sock.on('error', () => resolve(false));
      sock.setTimeout(500, () => {
        sock.destroy();
        resolve(false);
      });
    });
    if (listening) return true;
    await new Promise((resolve) => setTimeout(resolve, 200));
  }
  return false;
}

function locateBinary(bin) {
  const viaPath = (
    childProcess.spawnSync('/bin/sh', ['-c', `command -v ${bin} 2>/dev/null`], { encoding: 'utf8' }).stdout || ''
  ).trim();
  if (viaPath) return viaPath;
  for (const dir of ['/usr/sbin', '/usr/bin', '/usr/local/sbin', '/usr/local/bin']) {
    const candidate = path.join(dir, bin);
    if (fs.existsSync(candidate)) return candidate;
  }
  return '';
}

// Provisions a silent virtual printer used by the webContents.print() specs
// "Microsoft Print To PDF" on a file port on Windows, an ippeveprinter-backed
// driverless CUPS queue on Linux/macOS. Exposes it to the test process via
// ELECTRON_TEST_PRINTER_NAME and returns a synchronous teardown function (safe
// to register on 'exit'). Best-effort: on any failure the spec self-skips, so
// this never blocks the test run.
async function setupVirtualPrinter() {
  const noop = () => {};

  // Respect a printer provisioned by the environment.
  if (process.env.ELECTRON_TEST_PRINTER_NAME) {
    return noop;
  }

  try {
    if (process.platform === 'win32') {
      const printerName = 'ElectronTestPDF';
      const portFile = path.join(os.tmpdir(), `electron-print-${Date.now()}.pdf`);
      const ps = (script) => spawnCapture('powershell.exe', ['-NoProfile', '-NonInteractive', '-Command', script]);
      if ((await ps(`Add-PrinterPort -Name '${portFile}' -ErrorAction Stop`)).code !== 0) return noop;
      const addPrinter = await ps(
        `Add-Printer -Name '${printerName}' -DriverName 'Microsoft Print To PDF' -PortName '${portFile}' -ErrorAction Stop`
      );
      if (addPrinter.code !== 0) {
        await ps(`Remove-PrinterPort -Name '${portFile}' -ErrorAction SilentlyContinue`);
        return noop;
      }
      process.env.ELECTRON_TEST_PRINTER_NAME = printerName;
      console.log(`${pass} Provisioned virtual printer: ${printerName}`);
      return () => {
        childProcess.spawnSync(
          'powershell.exe',
          [
            '-NoProfile',
            '-NonInteractive',
            '-Command',
            `Remove-Printer -Name '${printerName}' -ErrorAction SilentlyContinue`
          ],
          { stdio: 'ignore' }
        );
        childProcess.spawnSync(
          'powershell.exe',
          [
            '-NoProfile',
            '-NonInteractive',
            '-Command',
            `Remove-PrinterPort -Name '${portFile}' -ErrorAction SilentlyContinue`
          ],
          { stdio: 'ignore' }
        );
        fs.rmSync(portFile, { force: true });
      };
    }

    // Linux / macOS: an IPP Everywhere virtual printer registered with CUPS.
    const ippeve = locateBinary('ippeveprinter');
    const lpadmin = locateBinary('lpadmin');
    if (!ippeve || !lpadmin) {
      console.log('Skipping virtual printer setup: ippeveprinter/lpadmin unavailable.');
      return noop;
    }

    const printerName = 'electron-ipp-test';
    // Remove any queue left behind by a previous interrupted run.
    await spawnCapture(lpadmin, ['-x', printerName]);

    const port = await getFreePort();
    const spoolDir = fs.mkdtempSync(path.join(os.tmpdir(), 'electron-ippeve-'));
    const ippServer = childProcess.spawn(
      ippeve,
      ['-f', 'application/pdf', '-p', String(port), '-d', spoolDir, '-k', 'Electron Test Printer'],
      { stdio: 'ignore' }
    );
    let serverExited = false;
    ippServer.on('exit', () => {
      serverExited = true;
    });
    // Don't let the long-running ippeveprinter keep the runner's event loop
    // alive; otherwise the process hangs on exit instead of running teardown.
    ippServer.unref();

    const teardown = () => {
      childProcess.spawnSync(lpadmin, ['-x', printerName], { stdio: 'ignore' });
      if (!serverExited) ippServer.kill();
      fs.rmSync(spoolDir, { recursive: true, force: true });
    };

    if (!(await waitForPort(port))) {
      teardown();
      console.log('Skipping virtual printer setup: ippeveprinter did not start.');
      return noop;
    }

    const add = await spawnCapture(lpadmin, [
      '-p',
      printerName,
      '-E',
      '-v',
      `ipp://localhost:${port}/ipp/print`,
      '-m',
      'everywhere'
    ]);
    if (add.code !== 0) {
      teardown();
      console.log(`Skipping virtual printer setup: lpadmin failed (${add.stderr.trim()}).`);
      return noop;
    }
    await spawnCapture(lpadmin, ['-d', printerName]);

    process.env.ELECTRON_TEST_PRINTER_NAME = printerName;
    console.log(`${pass} Provisioned virtual printer: ${printerName}`);
    return teardown;
  } catch (err) {
    console.log(`Skipping virtual printer setup: ${err}`);
    return noop;
  }
}

async function runElectronTests() {
  const errors = [];

  const testResultsDir = process.env.ELECTRON_TEST_RESULTS_DIR;
  for (const [runnerId, { description, run }] of runners) {
    if (runnersToRun && !runnersToRun.includes(runnerId)) {
      console.info('\nSkipping:', description);
      continue;
    }
    try {
      console.info('\nRunning:', description);
      if (testResultsDir) {
        process.env.MOCHA_FILE = path.join(testResultsDir, `test-results-${runnerId}.xml`);
      }
      await run();
    } catch (err) {
      errors.push([runnerId, err]);
    }
  }

  if (errors.length !== 0) {
    for (const err of errors) {
      console.error('\n\nRunner Failed:', err[0]);
      console.error(err[1]);
    }
    console.log(`${fail} Electron test runners have failed`);
    process.exit(1);
  }
}

async function asyncSpawn(exe, runnerArgs) {
  return new Promise((resolve, reject) => {
    let forceExitResult = 0;
    const child = childProcess.spawn(exe, runnerArgs, {
      cwd: path.resolve(__dirname, '../..')
    });
    if (process.env.ELECTRON_TEST_PID_DUMP_PATH && child.pid) {
      fs.writeFileSync(process.env.ELECTRON_TEST_PID_DUMP_PATH, child.pid.toString());
    }
    child.stdout.pipe(process.stdout);
    child.stderr.pipe(process.stderr);
    if (process.env.ELECTRON_FORCE_TEST_SUITE_EXIT) {
      child.stdout.on('data', (data) => {
        const failureRE = RegExp(`${FAILURE_STATUS_KEY}: (\\d.*)`);
        const failures = data.toString().match(failureRE);
        if (failures) {
          forceExitResult = parseInt(failures[1], 10);
        }
      });
    }
    child.on('error', (error) => reject(error));
    child.on('close', (status, signal) => {
      let returnStatus = 0;
      if (process.env.ELECTRON_FORCE_TEST_SUITE_EXIT) {
        returnStatus = forceExitResult;
      } else {
        returnStatus = status;
      }
      resolve({ status: returnStatus, signal });
    });
  });
}

function parseJUnitXML(specDir) {
  if (!fs.existsSync(process.env.MOCHA_FILE)) {
    console.error('JUnit XML file not found:', process.env.MOCHA_FILE);
    return [];
  }

  const xmlContent = fs.readFileSync(process.env.MOCHA_FILE, 'utf8');
  const parser = new DOMParser();
  const xmlDoc = parser.parseFromString(xmlContent, 'text/xml');

  const failedTests = [];
  // find failed tests by looking for all testsuite nodes with failure > 0
  const testSuites = xmlDoc.getElementsByTagName('testsuite');
  for (let i = 0; i < testSuites.length; i++) {
    const testSuite = testSuites[i];
    const failures = testSuite.getAttribute('failures');
    if (failures > 0) {
      const testcases = testSuite.getElementsByTagName('testcase');

      for (let i = 0; i < testcases.length; i++) {
        const testcase = testcases[i];
        const failures = testcase.getElementsByTagName('failure');
        const errors = testcase.getElementsByTagName('error');

        if (failures.length > 0 || errors.length > 0) {
          const testName = testcase.getAttribute('name');
          const filePath = testSuite.getAttribute('file');
          const fileName = filePath ? path.relative(specDir, filePath) : 'unknown file';
          const failureInfo = {
            name: testName,
            file: fileName,
            filePath
          };
          if (failures.length > 0) {
            failureInfo.failure = failures[0].textContent || failures[0].nodeValue || 'No failure message';
          }

          if (errors.length > 0) {
            failureInfo.error = errors[0].textContent || errors[0].nodeValue || 'No error message';
          }

          failedTests.push(failureInfo);
        }
      }
    }
  }

  return failedTests;
}

async function rerunFailedTest(specDir, testName, testInfo) {
  console.log('\n========================================');
  console.log(`Rerunning failed test: ${testInfo.name} (${testInfo.file})`);
  console.log('========================================');

  let grepPattern = testInfo.name;

  // Escape special regex characters in test name
  grepPattern = grepPattern.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');

  const args = [];
  if (testInfo.filePath) {
    args.push('--files', testInfo.filePath);
  }
  args.push('-g', grepPattern);

  const success = await runTestUsingElectron(specDir, testName, false, args);

  if (success) {
    console.log(`✅ Test passed: ${testInfo.name}`);
    return true;
  } else {
    console.log(`❌ Test failed again: ${testInfo.name}`);
    return false;
  }
}

async function rerunFailedTests(specDir, testName) {
  console.log('\n📋 Parsing JUnit XML for failed tests...');
  const failedTests = parseJUnitXML(specDir);

  if (failedTests.length === 0) {
    console.log('No failed tests could be found.');
    process.exit(1);
    return;
  }

  // Save off the original junit xml file
  if (fs.existsSync(process.env.MOCHA_FILE)) {
    fs.copyFileSync(process.env.MOCHA_FILE, `${process.env.MOCHA_FILE}.save`);
  }

  console.log(`\n📊 Found ${failedTests.length} failed test(s):`);
  failedTests.forEach((test, index) => {
    console.log(`  ${index + 1}. ${test.name} (${test.file})`);
  });

  // Step 3: Rerun each failed test individually
  console.log('\n🔄 Rerunning failed tests individually...\n');

  const results = {
    total: failedTests.length,
    passed: 0,
    failed: 0
  };

  let index = 0;
  for (const testInfo of failedTests) {
    let runCount = 0;
    let success = false;
    let retryTest = false;
    while (!success && runCount < args.enableRerun) {
      success = await rerunFailedTest(specDir, testName, testInfo);
      if (success) {
        results.passed++;
      } else {
        if (runCount === args.enableRerun - 1) {
          results.failed++;
        } else {
          retryTest = true;
          console.log(`Retrying test (${runCount + 1}/${args.enableRerun})...`);
        }
      }

      // Add a small delay between tests
      if (retryTest || index < failedTests.length - 1) {
        console.log('\nWaiting 2 seconds before next test...');
        await new Promise((resolve) => setTimeout(resolve, 2000));
      }
      runCount++;
    }
    index++;
  }

  // Step 4: Summary
  console.log('\n📈 Summary:');
  console.log(`Total failed tests: ${results.total}`);
  console.log(`Passed on rerun: ${results.passed}`);
  console.log(`Still failing: ${results.failed}`);

  // Restore the original junit xml file
  if (fs.existsSync(`${process.env.MOCHA_FILE}.save`)) {
    fs.renameSync(`${process.env.MOCHA_FILE}.save`, process.env.MOCHA_FILE);
  }

  if (results.failed === 0) {
    console.log('🎉 All previously failed tests now pass!');
  } else {
    console.log(`⚠️  ${results.failed} test(s) are still failing`);
    process.exit(1);
  }
}

async function runTestUsingElectron(specDir, testName, shouldRerun, additionalArgs = []) {
  let exe;
  if (args.electronVersion) {
    const installer = new Installer();
    exe = await installer.install(args.electronVersion);
  } else {
    exe = path.resolve(BASE, utils.getElectronExec());
  }
  let argsToPass = unknownArgs.slice(2);
  if (additionalArgs.includes('--files')) {
    argsToPass = argsToPass.filter(
      (arg) => arg.toString().indexOf('--files') === -1 && arg.toString().indexOf('spec/') === -1
    );
  }
  const runnerArgs = [`electron/${specDir}`, ...argsToPass, ...additionalArgs];
  if (process.platform === 'linux') {
    runnerArgs.unshift(path.resolve(__dirname, 'dbus_mock.py'), exe);
    exe = 'python3';
  }
  console.log(`Running: ${exe} ${runnerArgs.join(' ')}`);
  const { status, signal } = await asyncSpawn(exe, runnerArgs);
  if (status !== 0) {
    if (status) {
      const textStatus = process.platform === 'win32' ? `0x${status.toString(16)}` : status.toString();
      console.log(`${fail} Electron tests failed with code ${textStatus}.`);
    } else {
      console.log(`${fail} Electron tests failed with kill signal ${signal}.`);
    }
    if (shouldRerun) {
      await rerunFailedTests(specDir, testName);
    } else {
      process.exit(1);
    }
  }
  console.log(`${pass} Electron ${testName} process tests passed.`);
  return true;
}

async function runMainProcessElectronTests() {
  let shouldRerun = false;
  if (args.enableRerun && args.enableRerun > 0) {
    shouldRerun = true;
  }
  await runTestUsingElectron('spec', 'main', shouldRerun);
}

async function installSpecModules(dir) {
  const env = {
    npm_config_msvs_version: '2022',
    ...process.env,
    CXXFLAGS: process.env.CXXFLAGS,
    npm_config_yes: 'true'
  };
  if (args.electronVersion) {
    env.npm_config_target = args.electronVersion;
    env.npm_config_disturl = 'https://electronjs.org/headers';
    env.npm_config_runtime = 'electron';
    env.npm_config_devdir = path.join(os.homedir(), '.electron-gyp');
    env.npm_config_build_from_source = 'true';
    const { status } = childProcess.spawnSync('npm', ['run', 'node-gyp-install', '--ensure'], {
      env,
      cwd: dir,
      stdio: 'inherit',
      shell: true
    });
    if (status !== 0) {
      console.log(`${fail} Failed to "npm run node-gyp-install" install in '${dir}'`);
      process.exit(1);
    }
  } else {
    env.npm_config_nodedir = path.resolve(BASE, `out/${utils.getOutDir({ shouldLog: true })}/gen/node_headers`);
  }
  if (fs.existsSync(path.resolve(dir, 'node_modules'))) {
    await fs.promises.rm(path.resolve(dir, 'node_modules'), { force: true, recursive: true });
  }
  const yarnArgs = [YARN_SCRIPT_PATH, 'install', '--immutable'];
  const { status } = childProcess.spawnSync(process.execPath, yarnArgs, {
    env,
    cwd: dir,
    stdio: 'inherit'
  });
  if (status !== 0 && !process.env.IGNORE_YARN_INSTALL_ERROR) {
    console.log(`${fail} Failed to yarn install in '${dir}'`);
    process.exit(1);
  }

  // The native addon fixtures are workspaces, so yarn only runs their build
  // scripts once per install state and keeps whatever the root `yarn install`
  // built them against (the system Node.js headers in CI). N-API addons are
  // ABI-stable, so that is fine for them, but addons using Node's C++ module
  // API embed NODE_MODULE_VERSION and fail to load in Electron unless they are
  // compiled against the headers configured above. Such fixtures opt in with
  // "electron:requiresElectronHeaders": true in their package.json and get
  // rebuilt here.
  const nodeGyp = path.resolve(__dirname, '..', 'node_modules', 'node-gyp', 'bin', 'node-gyp.js');
  const nativeAddonsDir = path.resolve(dir, 'fixtures', 'native-addon');
  const toolchainEnv = getNativeAddonToolchainEnv();
  const rebuildEnv = { ...env, ...toolchainEnv };
  // CI pins NPM_CONFIG_MSVS_VERSION=2022 for the spec install, but the Windows
  // test runners only ship a newer Visual Studio; let node-gyp detect the
  // installed one, as the root install that built the fixtures did.
  for (const key of Object.keys(rebuildEnv)) {
    if (key.toLowerCase() === 'npm_config_msvs_version') {
      delete rebuildEnv[key];
    }
  }
  for (const addon of fs.readdirSync(nativeAddonsDir)) {
    const addonDir = path.join(nativeAddonsDir, addon);
    const packageJsonPath = path.join(addonDir, 'package.json');
    if (!fs.existsSync(packageJsonPath)) {
      continue;
    }
    const addonPackage = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
    if (!addonPackage['electron:requiresElectronHeaders']) {
      continue;
    }
    if (toolchainEnv === null) {
      // Not silent: the specs covering these fixtures are gated on this
      // variable and report as skipped, see spec/node.spec.ts.
      console.log(
        `${warn} No compiler on this host can build Electron's headers, not rebuilding native addon '${addon}'; its specs will be skipped`
      );
      process.env.ELECTRON_SKIP_ELECTRON_HEADER_ADDON_SPECS = '1';
      continue;
    }
    console.log(`Rebuilding native addon '${addon}' against Electron's node headers`);
    const { status: rebuildStatus } = childProcess.spawnSync(process.execPath, [nodeGyp, 'rebuild'], {
      env: rebuildEnv,
      cwd: addonDir,
      stdio: 'inherit'
    });
    if (rebuildStatus !== 0) {
      console.log(`${fail} Failed to rebuild native addon '${addon}' in '${addonDir}'`);
      process.exit(1);
    }
  }
}

// Electron's V8 headers do not compile with GCC <= 12 (attribute ordering on
// deprecated classes, see https://github.com/electron/electron/issues/53284),
// which is what the Linux CI test image ships. When the Chromium toolchain
// from the source checkout is available (CI restores it into the test job's
// src_artifacts) build the addons with clang and Electron's libc++, mirroring
// script/nan-spec-runner.js. Without it fall back to the system compiler.
//
// Returns null when the Chromium toolchain is present but cannot run on this
// host: the linux-arm64 test job runs on an arm64 host but restores the x64
// clang of the (cross-compiling) build job, and the system compiler there is
// the same GCC that rejects the headers, so nothing on that host can build
// the fixtures.
function getNativeAddonToolchainEnv() {
  if (args.electronVersion || process.platform !== 'linux') {
    return {};
  }
  const outDir = utils.getOutDir();
  const clangDir = path.resolve(BASE, 'third_party', 'llvm-build', 'Release+Asserts', 'bin');
  const libcxxConfigDir = path.resolve(BASE, 'buildtools', 'third_party', 'libc++');
  const libcxxIncludeDir = path.resolve(BASE, 'third_party', 'libc++', 'src', 'include');
  const libcxxabiIncludeDir = path.resolve(BASE, 'third_party', 'libc++abi', 'src', 'include');
  const libcxxLibDir = path.resolve(BASE, 'out', outDir, 'obj', 'buildtools', 'third_party', 'libc++');
  const libcxxabiLibDir = path.resolve(BASE, 'out', outDir, 'obj', 'buildtools', 'third_party', 'libc++abi');
  const required = [
    path.join(clangDir, 'clang++'),
    libcxxConfigDir,
    libcxxIncludeDir,
    libcxxabiIncludeDir,
    libcxxLibDir
  ];
  if (!required.every((p) => fs.existsSync(p))) {
    console.log('Chromium clang/libc++ not found, building native addons with the system compiler');
    return {};
  }
  const { error: clangError, status: clangStatus } = childProcess.spawnSync(
    path.join(clangDir, 'clang++'),
    ['--version'],
    { stdio: 'ignore' }
  );
  if (clangError || clangStatus !== 0) {
    console.log(
      `${warn} Chromium clang cannot run on this ${process.arch} host (${clangError ? clangError.code : `exit code ${clangStatus}`})`
    );
    return null;
  }
  const targetArch = process.env.npm_config_arch || process.env.NPM_CONFIG_ARCH || process.arch;
  const targetFlags = [];
  if (targetArch !== process.arch) {
    const target = {
      arm: ['arm-linux-gnueabihf', 'bullseye_armhf'],
      arm64: ['aarch64-linux-gnu', 'bullseye_arm64'],
      ia32: ['i686-linux-gnu', 'bullseye_i386'],
      x64: ['x86_64-linux-gnu', 'bullseye_amd64']
    }[targetArch];
    if (!target) {
      throw new Error(`Unsupported native addon target architecture: ${targetArch}`);
    }
    const [triple, sysrootName] = target;
    const sysroot = path.resolve(BASE, 'build', 'linux', require('./sysroots.json')[sysrootName].SysrootDir);
    if (!fs.existsSync(sysroot)) {
      throw new Error(`Missing sysroot for ${targetArch} native addons: ${sysroot}`);
    }
    targetFlags.push(`--target=${triple}`, `--sysroot="${sysroot}"`);
  }
  const ldflags = ['-stdlib=libc++', '-fuse-ld=lld', `-L"${libcxxLibDir}"`];
  // Sanitizer builds compile libc++abi into the electron executable and export
  // it from there (export_libcxxabi_from_executables in Chromium's
  // build/config/c++/c++.gni) instead of producing a static library, so link
  // against it only when it exists; otherwise the symbols resolve from the
  // executable when the addon is loaded.
  if (fs.existsSync(path.join(libcxxabiLibDir, 'libc++abi.a'))) {
    ldflags.push(`-L"${libcxxabiLibDir}"`, '-lc++abi');
  }
  return {
    CC: path.join(clangDir, 'clang'),
    CXX: path.join(clangDir, 'clang++'),
    LD: path.join(clangDir, 'lld'),
    npm_config_arch: targetArch,
    CFLAGS: [process.env.CFLAGS, '-Wno-trigraphs -fPIC', ...targetFlags].filter(Boolean).join(' '),
    CXXFLAGS: [
      process.env.CXXFLAGS,
      '-Wno-trigraphs',
      '-nostdinc++',
      `-isystem "${libcxxConfigDir}"`,
      `-isystem "${libcxxIncludeDir}"`,
      `-isystem "${libcxxabiIncludeDir}"`,
      '-fvisibility-inlines-hidden',
      '-fPIC',
      '-D_LIBCPP_ABI_NAMESPACE=Cr',
      '-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE',
      ...targetFlags
    ]
      .filter(Boolean)
      .join(' '),
    LDFLAGS: [process.env.LDFLAGS, ...ldflags, ...targetFlags].filter(Boolean).join(' ')
  };
}

function getSpecHash() {
  return Promise.all([
    (async () => {
      const hasher = crypto.createHash('SHA256');
      hasher.update(fs.readFileSync(path.resolve(__dirname, '../yarn.lock')));
      hasher.update(fs.readFileSync(path.resolve(__dirname, '../spec/package.json')));
      hasher.update(fs.readFileSync(path.resolve(__dirname, '../script/spec-runner.js')));
      return hasher.digest('hex');
    })(),
    (async () => {
      const specNodeModulesPath = path.resolve(__dirname, '../spec/node_modules');
      if (!fs.existsSync(specNodeModulesPath)) {
        return null;
      }
      const { hash } = await hashElement(specNodeModulesPath, {
        folders: {
          exclude: ['.bin']
        }
      });
      return hash;
    })()
  ]);
}

main().catch((error) => {
  console.error('An error occurred inside the spec runner:', error);
  process.exit(1);
});